From 941b1cdae83039c99fc5c1884a98d2afd39760e5 Mon Sep 17 00:00:00 2001 From: "Stephen M. Cameron" Date: Wed, 9 Mar 2011 17:00:06 -0600 Subject: [SCSI] hpsa: export resettable host attribute This attribute, requested by Redhat, allows kexec-tools to know whether the controller can honor the reset_devices kernel parameter and actually reset the controller. For kdump to work properly it is necessary that the reset_devices parameter be honored. This attribute enables kexec-tools to warn the user if they attempt to designate a non-resettable controller as the dump device. Signed-off-by: Stephen M. Cameron Signed-off-by: James Bottomley --- drivers/scsi/hpsa.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'drivers/scsi/hpsa.c') diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index dcabef4bb149..415ad4fb50d4 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -273,6 +273,44 @@ static ssize_t host_show_transport_mode(struct device *dev, "performant" : "simple"); } +/* List of controllers which cannot be reset on kexec with reset_devices */ +static u32 unresettable_controller[] = { + 0x324a103C, /* Smart Array P712m */ + 0x324b103C, /* SmartArray P711m */ + 0x3223103C, /* Smart Array P800 */ + 0x3234103C, /* Smart Array P400 */ + 0x3235103C, /* Smart Array P400i */ + 0x3211103C, /* Smart Array E200i */ + 0x3212103C, /* Smart Array E200 */ + 0x3213103C, /* Smart Array E200i */ + 0x3214103C, /* Smart Array E200i */ + 0x3215103C, /* Smart Array E200i */ + 0x3237103C, /* Smart Array E500 */ + 0x323D103C, /* Smart Array P700m */ + 0x409C0E11, /* Smart Array 6400 */ + 0x409D0E11, /* Smart Array 6400 EM */ +}; + +static int ctlr_is_resettable(struct ctlr_info *h) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++) + if (unresettable_controller[i] == h->board_id) + return 0; + return 1; +} + +static ssize_t host_show_resettable(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ctlr_info *h; + struct Scsi_Host *shost = class_to_shost(dev); + + h = shost_to_hba(shost); + return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h)); +} + static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[]) { return (scsi3addr[3] & 0xC0) == 0x40; @@ -379,6 +417,8 @@ static DEVICE_ATTR(commands_outstanding, S_IRUGO, host_show_commands_outstanding, NULL); static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL); +static DEVICE_ATTR(resettable, S_IRUGO, + host_show_resettable, NULL); static struct device_attribute *hpsa_sdev_attrs[] = { &dev_attr_raid_level, @@ -392,6 +432,7 @@ static struct device_attribute *hpsa_shost_attrs[] = { &dev_attr_firmware_revision, &dev_attr_commands_outstanding, &dev_attr_transport_mode, + &dev_attr_resettable, NULL, }; -- cgit v1.2.3